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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PCF8564A датащи(PDF) 34 Page - NXP Semiconductors |
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PCF8564A датащи(HTML) 34 Page - NXP Semiconductors |
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34 / 65 page  PCF85063A All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2018. All rights reserved. Product data sheet Rev. 7 — 30 March 2018 34 of 65 NXP Semiconductors PCF85063A Tiny Real-Time Clock/calendar with alarm function and I2C-bus 9.4 Acknowledge The number of data bytes transferred between the START and STOP conditions from transmitter to receiver is unlimited. Each byte of 8 bits is followed by an acknowledge cycle. • A slave receiver, which is addressed, must generate an acknowledge after the reception of each byte • Also a master receiver must generate an acknowledge after the reception of each byte that has been clocked out of the slave transmitter • The device that acknowledges must pull-down the SDA line during the acknowledge clock pulse, so that the SDA line is stable LOW during the HIGH period of the acknowledge related clock pulse (set-up and hold times must be considered) • A master receiver must signal an end of data to the transmitter by not generating an acknowledge on the last byte that has been clocked out of the slave. In this event, the transmitter must leave the data line HIGH to enable the master to generate a STOP condition Acknowledgement on the I2C-bus is shown in Figure 21. Fig 20. System configuration Fig 21. Acknowledgement on the I2C-bus |
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